Editing Pregolya

{{short description|River in Kaliningrad Oblast, Russia}}
{{redirect|Pregola|the Italian municipality|Brallo di Pregola}}
{{Infobox river
| name              = Pregolya
| image             = Gvardeisk_town_russia_view.jpg
| image_size        = 
| image_caption     = The Pregolya in [[Gvardeysk]]
| mapframe          = yes
| mapframe-zoom     = 7
| source1_location  = [[Instruch]] and [[Angrapa]] confluence
| mouth_location    = [[Vistula Lagoon]], [[Baltic Sea]]
| mouth_coordinates = {{coord|54.6827|20.3778|display=it|region:RU_type:river}}
| subdivision_type1 = Country
| subdivision_name1 = [[Russia]]
| length            = 
| source1_elevation = 
| mouth_elevation   = 
| discharge1_avg    = {{convert|90|m3/s|abbr=on}}
| basin_size_km2 = 15,500
| extra             = 
}}

The '''Pregolya''' or '''Pregola''' ({{langx|ru|Преголя}}; {{langx|de|Pregel}}; {{langx|lt|Prieglius}}; {{langx|pl|Pregoła}}) is a [[river]] in the [[Russia]]n [[Kaliningrad Oblast]] exclave.

==Name==
A possible ancient name by [[Ptolemy]] of the Pregolya River is Chronos (from Germanic *''hrauna'', "stony"){{Citation needed|date=December 2020}}, although other theories identify Chronos as a much larger river, the [[Nemunas]].{{Citation needed|date=December 2020}}

The oldest recorded names of the river are ''Prigora'' (1302), ''Pregor'' (1359), ''Pregoll, Pregel'' (1331), ''Pregill'' (1460). Georg Gerullis connected the name with Lithuanian ''prãgaras'', ''pragorė̃'' ("abyss") and the Lithuanian verb ''gérti'' ("drink"). Vytautas Mažiulis instead derived it from ''spragė́ti'' or ''sprógti'' ("burst") and the suffix -''ara'' ("river").<ref>{{Cite web| title=An attempt at an etymological analysis of Ptolemy´s hydronyms of eastern Balticum | url=http://journals.lki.lt/actalinguisticalithuanica/article/download/856/947/ | archive-url=https://web.archive.org/web/20241121012728/https://journals.lki.lt/actalinguisticalithuanica/article/download/856/947 | archive-date=2024-11-21}}</ref>

==Overview==
It starts as a [[confluence]] of the [[Instruch]] and the [[Angrapa]] and drains into the [[Baltic Sea]] through the [[Vistula Lagoon]]. Its length under the name of Pregolya is 123&nbsp;km, 292&nbsp;km including the [[Angrapa]]. The [[drainage basin|basin]] has an area of 15,500&nbsp;km<sup>2</sup>. The average flow is 90 m<sup>3</sup>/s.

Euler's [[Seven Bridges of Königsberg]] problem was based on the bridges crossing the river in [[Königsberg]] (now [[Kaliningrad]]).

==Cities and towns==
*[[Chernyakhovsk]]
*[[Znamensk, Kaliningrad Oblast|Znamensk]]
*[[Gvardeysk]]
*[[Kaliningrad]]

==Tributaries==
*[[Pissa (river)|Pissa]] 
*[[Łyna (river)|Lava/Łyna]]
*[[Angrapa]] 
*[[Instruch]]

==See also==
*[[List of rivers of Russia]]
*[[Seven Bridges of Königsberg|Bridges of Konigsberg problem]]

==References==
{{Reflist}}

{{Rivers of Russia}}
{{Authority control}}

[[Category:Rivers of Kaliningrad Oblast]]
[[Category:Pregolya basin| ]]


{{KaliningradOblast-geo-stub}}
{{Russia-river-stub}}